US12554100B2ActiveUtilityA1
Imaging lens
Assignee: GUANGZHOU LUXVISIONS INNOVATION TECH LIMITEDPriority: May 9, 2023Filed: Jan 2, 2024Granted: Feb 17, 2026
Est. expiryMay 9, 2043(~16.8 yrs left)· nominal 20-yr term from priority
Inventors:LIU YI-WEI
G02B 13/0045G02B 13/18G02B 9/64G02B 13/006
58
PatentIndex Score
0
Cited by
3
References
11
Claims
Abstract
An imaging lens, sequentially including a first lens element to a seventh lens element from an object side to an image side along an optical axis, is provided. The first lens element has positive refracting power. The second lens element has negative refracting power. The third lens element and the fourth lens element form a cemented lens element, and the cemented lens element has positive refracting power. The fifth lens element has positive refracting power. The sixth lens element has positive refracting power. The seventh lens element has negative refracting power.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . An imaging lens, sequentially comprising from an object side to an image side along an optical axis:
a first lens element, having positive refracting power; a second lens element, having negative refracting power; a third lens element; a fourth lens element, wherein the third lens element and the fourth lens element form a cemented lens element, and the cemented lens element has positive refracting power; a fifth lens element, having positive refracting power; a sixth lens element, having positive refracting power; and a seventh lens element, having negative refracting power, wherein the imaging lens satisfies a conditional expression:
-
7
.
0
7
<
(
L
2
R
1
)
×
(
L
2
R
2
)
L
2
R
2
-
L
2
R
1
<
-
5
.
5
2
where L2R1 is a radius of curvature of an object side surface of the second lens element in an optical axis region, and L2R2 is a radius of curvature of an image side surface of the second lens element in an optical axis region.
2 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
2
.
4
3
7
<
(
L
5
R
1
)
×
(
L
5
R
2
)
L
5
R
2
-
L
5
R
1
<
3
.
1
6
where L5R1 is a radius of curvature of an object side surface of the fifth lens element in an optical axis region, and L5R2 is a radius of curvature of an image side surface of the fifth lens element in an optical axis region.
3 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
4
.
8
1
<
(
L
6
R
1
)
×
(
L
6
R
2
)
L
6
R
2
-
L
6
R
1
<
8
6
.
9
6
where L6R1 is a radius of curvature of an object side surface of the sixth lens element in an optical axis region, and L6R2 is a radius of curvature of an image side surface of the sixth lens element in an optical axis region.
4 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
0
.
8
<
(
L
3
R
1
)
+
(
L
4
R
2
)
(
-
L
3
R
1
)
+
(
L
4
R
2
)
<
1
.
1
6
where L3R1 is a radius of curvature of an object side surface of the third lens element in an optical axis region, and L4R2 is a radius of curvature of an image side surface of the fourth lens element in an optical axis region.
5 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
-
3
.
0
8
<
FL
2
EFL
<
-
2
.
5
where FL2 is a focal length of the second lens element, and EFL is an effective focal length of the imaging lens.
6 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
1
.
2
1
<
FL
5
EFL
<
1
.
3
9
where FL5 is a focal length of the fifth lens element, and EFL is an effective focal length of the imaging lens.
7 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
0
.
2
9
5
<
G
12
+
T
2
+
G
23
+
T
3
+
T
4
+
G
45
TTL
<
0
.
3
4
2
where G12 is a gap between the first lens element and the second lens element on the optical axis, G23 is a gap between the second lens element and the third lens element on the optical axis, G45 is a gap between the fourth lens element and the fifth lens element on the optical axis, T2 is a thickness of the second lens element on the optical axis, T3 is a thickness of the third lens element on the optical axis, T4 is a thickness of the fourth lens element on the optical axis, and TTL is a distance from an object side surface of the first lens element to an image plane on the optical axis.
8 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
0
.
1
1
3
<
G
56
TTL
<
0
.
1
3
where G56 is a gap between the fifth lens element and the sixth lens element on the optical axis, and TTL is a distance from an object side surface of the first lens element to an image plane on the optical axis.
9 . The imaging lens according to claim 1 , wherein the imaging lens further satisfies a conditional expression:
1
.
3
4
≤
TTL
ImgH
<
1
.
5
where TTL is a distance from an object side surface of the first lens element to an image plane on the optical axis, and ImgH is an image height of the imaging lens.
10 . The imaging lens according to claim 1 , wherein a refractive index Nd of the fourth lens element falls within a range of 1.6 to 1.7.
11 . The imaging lens according to claim 1 , wherein an Abbe number of the fourth lens element is less than 30.Join the waitlist — get patent alerts
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